Boiler



W. M. ROTH Aug. 13, 1940.

BOILER Filed March 18, 1939 6 Sheets-Sheet l W. M. ROTH Aug. 13, 1940.

BOILER Filed March 18, 1939 6 Sheets-Sheet 2 m a w n n 156 a M I Z m W e Q W N n m a Q Kw mw X. M MR W. M. ROTH Aug. 13, 1940.

BOILER Filed March 18, 1939 6 Sheets-Sheet 3 nor 2?, I no h wdel if ]%2% jam A iiorneys Aug. 13, 1940.

w. M. ROTH 2,211,674

BOILER Filed March 18, 1939 6 Sheets-Sheet 4 Inventor MzzJeZ M B01 5 A iiorneys W. M. ROTH BOILER Aug. 13, 1940.

Filed March 18, 1939 6 Sheets-Sheet 5 I Inventor NN JRN hfmdeZMBOf/Z u n M A tiorneys Aug. 13, 1940.

'w. M. ROTH BOILER 6 Sheets-Sheet 6 H? i Filed March 18 1939 Inventor r I I I I I I I I A iiorneys Patented Aug. 13, 1940 UNITED STATES PATENT FricE Application March 18,

3 Claims.

This invention relates to new and useful improvements in boilers, especially adapted for steam heating plants, the same being an improvement on my Patent No. 2,146,094, issued February '7, 1939.

The principal object of the present invention is to provide a boiler construction made up of a plurality of boiler sections which can be increased or decreased in number to accord with the size of plant required.

An important object of the present invention over my above referred to patent is to provide a boiler construction wherein various standardized sections are employed which can be interchanged in various manners and increased or decreased in numbers for the purpose of building up or reducing the size of plant desired.

Still another important object of the invention is to provide a boiler construction designed in sections and wherein the sections are so constructed as to cause water therein to circulate in a turbulent fashion contemplated to acquire considerable more of the heat rising from the firebox than is obtainable in present-day types ofboilers.

A further object of the invention is to provide simple clean-out means for sediment which can be operated at any time and as frequently as desired with but a minimum amount of effort on the part of the attendant.

These and various other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:

Figure 1 represents a side elevational view of the boiler.

Figure 2 is a vertical sectional view through the boiler.

Figure 3 is a vertical sectional view at right angles to the plane on which the sectional view Figure 2 is taken.

Figure 4 is a section on the line 44 of Figure 3.

Figure 5 is a side elevational view of one of the boiler sections.

Figure 6 is an edge elevational view of one the boiler sections.

Figure 10 is a side elevational view of the receiver. v

1939, Serial No. 262,710

Figure 11 is a top plan view of the receiver.

Figure 12 is an end elevational view of the receiver with the end wall removed.

Figure 13 is a front elevational view of one of the water legs.

Figure 14 is a side elevational view of one of the water legs.

Figure 15 is a side elevational view of the rotary element of one of the cleaning units.

Figure 16 is a top plan view of the element shown in Figure 15.

Figure 1'7 is an enlarged detailed sectional View throughone of the connecting bushings between one of the boiler sections and the receiver. 1

Figure 18 is a longitudinal sectional view through one of the jet bushings (see Figure 3).

Figure 19 is a side elevational view of one of the tubular leg couplings (see Figure 3).

Figure 20 is a bottom plan view of one of the couplings.

Figure 21 is a fragmentary vertical sectional View through the upper portion of a duplex type boiler constructed in accordance with the present invention.

Figure 22 represents a side elevational View of an integral boiler section especially adapted for coal type furnaces.

' Referring to the drawings wherein like numerals designate like parts, it can be seen that Figure 3 shows the boiler constructed boilersections 5 extending only from one side of a receiver generally referred to by numeral 6, while in Figure 21 the boiler sections 5 are extending from opposite sides of the receiver 6. While the receiver 6 may be designed to accommodate six or more sections 5 on each side thereof, it is to be understood that even less than the number for which the receiver 6 is designed can be used by simply plugging up extra threaded openings 1, 8 and 9 with suitable plugs H] (see Figures 3 and 10).

Assuming that the sections 5 are to extend only from one side of the receiver 6. All of the openings l, 8 and 9 0n the opposite side of the receiver will be plugged. Each section 5 will be connected to the corresponding side of the receiver 6 by a tubular threaded bushings II, I2 and I3, the bushings 13 being in the form of jets, the purpose for whichwill be described hereinafter.

Under the receiver 6 will be disposed a pair of hollow water legs 14 or IE. Both of these legs are of identical construction, each having at its upper inside edge portions, an inwardly disposed lip l6 provided with an upstanding flange H which prevents fire contact with gaskets l8 which are interposed between the water legs and conduit couplings it and integral neck 26 depending from each of the boiler sections 5. The neck 20 is suitably flanged and is secured to the underlying water leg 5 by machine screws or the like 2|, while laterally enlarged flanges 22 of the couplings l9 are also secured to the water legs M by machine screws or the like 23. These couplings l9 are threadedly disposed upwardly through the bottom of the receiver 6. As shown in Figure 3, just above the bottom of the receiver 6 is a horizontal partition 24 which has an opening therein normally plugged as at 25 when the boiler is used as shown in Figure 3. The bottom of the receiver 6 has laterally extending flanges 26, one of which as shown in Figure 3' serves to underlap the adjacent ends of the boiler sections 5.

The normal water level is represented at nu meral 21. A space 23 above the water level in the receiver 6 accommodates a steam head, while immersed in the water of the receiver 6 is a coil 29 for domestic hot water service.

Each of the water legs I4 and I5 has a longitudinally bored out sediment receiving chamber 30 at its bottom which is in communication with the water compartment 3| by way of a slot 32. Just above this slot 32 is a rotary trough-like element 33 which has a threaded end portion threadedly disposed into the front side of the leg and this threaded portion 34 is provided with polygonal flange wrench engageable extension 35. Bridge members 36 and 31 serve to strengthen this element, while the bottom of the element is formed with openings 38. Obviously, sediment in precipitating will settle through the trough-like rotary element 33 and settle into a chamber 36. When it is desired to fiush this chamber, all that is required is that the rotary element 33 of each of the legs l4 and I5 be rotated so that its opening 38 will be out of registration with the slot 32, whereupon a valve 39 in the flushing pipe extension 404| can be opened so that the water in the receiver 6 under the pressure of the steam head will be forced downwardly through the pipe 42 and by way of the connection 43 into each of the chambers 3|] so that these chambers can be flushed out through their corresponding faucets 44. After the flushing operation has taken place, and this may be performed as frequently as de sired, the faucets 44 are again closed and the valves 39 are again closed and with the valve 45 remaining open, circulation will be resumed between the leg l4 and the receiver 6 by way of the pipe 42. As can be seen in Figure 3, numeral 46 represents a return pipe of a steam system, for returning condensation to the boiler. It will be observed, that the purpose in having the pipe connection 42 between the receiver 6 and the single water leg M is to promote circulation of water in the receiver 6. The top of the receiver 6 has the threaded opening 41 for the steam outlet to the heating system. As can be seen in Figure 2, one end of the receiver 6 is provided with a removable wall 48 which is secured in place by machine screws or the like 49.

Each of the boiler sections 5 consists of a substantially inverted U-shaped frame made up of leg portions 55 and 5| and a bridge or bight portion 52. As shown in Figure 8, these leg portions 56 and 5| are of uniform width. A circular duct 53 which is interposed between a substantially thin booster chamber 54 and the substantially same thickness head chamber 55 is of a width incident with the width of the legs and 5| and.

the arcuate-shaped communicating duct 56 concentrically disposed with respect to an annular duct 53 and communicating a booster chamber 54 with the head chamber 55 are also of substantially the same width as the legs 56 and 5|. As can be seen in Figure 5, the hot gases and products of combustion from a fire chamber 51 (see also Figure 2) pass upwardly between the thin booster chamber 54 and between the duct 56 and the annular duct 53 and between the arcuate duct 56 and the legs 56 and 5|. As these hot products of combustion strike the first baflles 51-51 they are caused to pass upwardly between the inner ends of the bafiies where some of the gases pass laterally and the rest upwardly against the bottom of a shield 58. Auxiliary baflles 5959 cause these gases to separate in this manner and to concentrate the gases above the ducts 53 and 54 so that the head chamber 55 obtains as much heat as possible from the gases before they strike a was 60 and pass outwardly through a flue line opening iii. The gases pass through the opening 5| to the back of the boiler where they pass upwardly through a duct 62 to the top passageway defined by openings 63 through the boiler sections 5 and from thence forwardly to a down duct 64, inwhich suitable baffles or dampers may "be placed if desired to further conserve heat. "The lower end of this duct 64 communicates with a stack pipe 55 which extends through the annular duct 53 to a stack elbow 66 and as is shown in Figure 2, suitable insulation is placed between the stack pipe 55 and the annular duct 53 and is denoted by numeral 61, the purpose being to insulate the annular duct 53 from the somewhat lower temperature of the stack pipe 65.

The opening 63 for the gases of combustion is intersected by narrow ducts 68 which extend from the head chamber 55 to the hollow bridge portion '53 of the boiler section frame to accommodate steam which will pass through the upper tubular "couplings into the steam head portion of the receiver 6.

As seen in Figure 6, the leg 50 of each boiler.

section 5 has its upper side portions adjacent the head chamber 55 reduced as at -10 so that in in the booster chamber 54 to rise upwardly through the ducts 56 and 53 to reach the head chamber 55 where it moves laterally to down passageways 1|. These down passageways are located in the legs 56 and 5|. In other Words the legs 56 and 5| are divided internally by a partition 12 to define the down flow passageways 1| and up flow passageways 13. Thus water flows upwardly through the ducts 53, 56 and the passageways 13 and return by way of the passageways 1|. Thus a double turbulence occurs in each of the boiler sections which has a high degree of efiiciency in producing the necessary vapor which flushes against a combustion gas passageway Wall 14 and culminates in the formation of steam which passes into the upper portion of the receiver 6 through the tubular bushings after again passing through the hot gases line by way of the intercepting tubes 68. The condensation between two bands of boiler sections.

above the tubes 68 will return down side passageways -15-15.

As can be seen in Figure 3, the upper ends of the partition 12 curve inwardly as at 16 to catch the water and assist in the production of the above referred to duplex turbulence.

Whatever passage of water takes place between a lower compartment ll of the receiver 5 and the boiler sections 5 at the booster chambers 54 will be precluded from interfering with the turbulent action of the water in the boiler sections due to the jet construction of the coupling bushings [3 which have jet-like extensions 18 which allow the water to pass into the booster chambers 54 well beyond the lower ends of the adjacent partitions '12.

The duplex type of boiler is shown in Figure 1 and involves the same boiler sections as are represented in the preceding description. In the duplex type of boiler the receiver 6 is interposed The plugs it shown in Figure 3 are removed and the additional tubular bushings H, l2 and [3 are added. The opening in the end of the receiver 6 for the pipe is plugged at '19, and in place of the plug 25 for the single type of boiler, the plug 25 is removed and a short tube 81! is inserted in depending position as shown in Figure 21.

Furthermore, instead of the tubular couplings l9 between the leg Hi and the bottom of the re ceiver 6, each of the openings in the bottom of the receiver for a coupling I9 is closed by a plug 8|. Water in being heated in the lower chamber Tl passes out through the bushings l3 and merges with the turbulent action of the water in the laterally disposed sections 5-5. The circulation is promoted by the presence of the tube 811 which extends downwardly and has its open lower end Very close to the bottom of the chamber Tl while the outlet bushings iii are close to the top of the chamber. Thus water from the receiver 6 passes into the chamber ll at the lowest temperature point thereof and after being heated in the chamber Tl rises and passes outwardly through the bushings 53. Thus a circulation is set up between the receiver 6 and the turbulent paths of water in the boiler sections 5.

Figure 22 shows a modification of the invention in that the boiler sections are self-contained but employ the construction consistent with Figures 3 and 5 for promoting a duplex turbulence of the water in each boiler section. This structure is generally referred to by numeral 83 and consists of the frame structure involving legs 50a, 51a and bridge member each constructed consistently with the sections shown in Figure 5 and involving the same construction of water ducts 56a and 53a in conjunction with the same type and arrangement of baiiles 51a and 59a, along with the same arrangement of openings forming the combustion gases passageways through the boiler sections.

This type is especially adapted for present-day types of coal furnaces in that the water legs I la and 55a are formed integrally with the boiler section 83. Thus with the water legs Ma and [5a formed integrally with the upper boiler construction, the carrying out of the present invention in old types of plants can be executed where repairs 0 or replacements are required.

as well as the top of the thus constructed furnace are covered by an insulating shell made up of the sheet metal plates 85 suitably secured together by rims 86 and each of these plates 85 has a lining 81 of insulation.

A side plate 85 opposed to the ends of the boiler sections 5 having the reduced portions 10 therein, is formed with openings 88 which are normally closed by removable plates 39. Obviously by removing these plates 89 access can be had to the boiler sections so that a sweeper or cleaner can be inserted between the boiler sections for the purpose of removing soot, etc.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

1. In a boiler structure, a receiver, boiler sections extending laterally from the receiver and in operative communication therewith, water legs for the receiver and boiler sections, a sediment receiving pocket at the bottom of each of the legs, a trough-like member rotatably mounted above each of the pockets and being formed with openings through which sediment can fall into said pocket, said perforated trough-like member being rotatable to shut off the pocket from the portion of the leg above the pocket, and a wash out line in communication with the said pocket and adapted to discharge fluid under pressure through the pocket to wash out sediment therein.

2. In a boiler structure, a receiver, boiler sections extending laterally from the receiver and in operative communication therewith, water legs for the receiver and boiler sections, a sediment receiving pocket at the bottom of each of the legs, a trough-like member rotatably mounted above each of the pockets and being formed with openings through which sediment can fall into said pocket, said perforated trough-like member being rotatable to shut ofi the pocket from the portion of the leg above the pocket, and a wash out line in communication with the said pocket and adapted to discharge fluid under pressure through the pocket to wash out sediment therein, said line extending downwardly from the said receiver.

3. In a boiler structure, a receiver, boiler sections extending laterally from the receiver and in operative communication therewith, water legs for the receiver and boiler sections, a sediment receiving pocket at the bottom of each of the legs, a trough-like member rotatably mounted above each of the pockets and being formed with openings through which sediment can fall into said pocket, said perforated trough-like member being rotatable to shut off the pocket from the portion of the leg above the pocket, and a wash out line in communication with the said pocket and adapted to discharge fluid under pressure through the pocket'to wash out sediment therein, said line extending downwardly from the said receiver, said line having a branch pipe extending to communicate with the leg above the rotary element to promote circulation between the leg and the receiver.

WENDEL M. ROTH, 

